Keystones — Lintel
Five GCSE retrieval questions · 23 January 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 860,000 in standard form
Answer: 8.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x + 4
Answer: (x - 1)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 58°. Find opposite. Give your answer to 2 decimal places
Answer: 46.41cm -
4. Ratio Mixed ratio problems
Orange and purple counters are in the ratio 11:3. What fraction of the counters are orange?
Answer: 11⁄14 -
5. Statistics Mean
Calculate the mean of: 13, 9, 48, 46, 21, 31
Answer: 28